Dedicated to homer r. warner. mD. phD. FACMI A Principal Founder of the Field of Biomedical Informatics 1922-2012 The Fourth Edition of Biomedical Informatics: Computer Applications in Health Care and Biomedicine is dedicated to the memory and professional contributions of Homer R. Warner. Homer was not only a pioneer in biomedi- cal informatics but a sustained contributor who is truly one of the founders of the field that mourned his loss in November of 2012. Homer's publications on the use of computers in health care span 50 years, from 1963 to 2012, but he can claim an additional decade of informatics research that predated digital computer use, including the use of analog computers and mathematical models anging from details of cardiac function all the way up to medical diagnosis He is best known for his development of the Health Evaluation throu Logical Processing(HELP)system, which was revolutionary in its own right as a hospital information system, but was truly visionary in its inclusion of the logical modules for generating alerts and reminders. The HELP system Warner, H.R., Toronto, A. F, Veasey, L. G,& Stephenson, R. 1961. A mathematical approach to medical diagnosis. Application to congenital heart disease. JAMA: The JournalDedicated to Homer R. Warner, MD, PhD, FACMI A Principal Founder of the Field of Biomedical Informatics 1922–2012 The Fourth Edition of Biomedical Informatics : Computer Applications in Health Care and Biomedicine is dedicated to the memory and professional contributions of Homer R. Warner. Homer was not only a pioneer in biomedi￾cal informatics but a sustained contributor who is truly one of the founders of the fi eld that mourned his loss in November of 2012. Homer’s publications on the use of computers in health care span 50 years, from 1963 to 2012, but he can claim an additional decade of informatics research that predated digital computer use, including the use of analog computers and mathematical models ranging from details of cardiac function all the way up to medical diagnosis. 1 He is best known for his development of the Health Evaluation through Logical Processing (HELP) system, which was revolutionary in its own right as a hospital information system, but was truly visionary in its inclusion of the logical modules for generating alerts and reminders. The HELP system, 1 Warner, H. R., Toronto, A. F., Veasey, L. G., & Stephenson, R. 1961. A mathematical approach to medical diagnosis. Application to congenital heart disease. JAMA: The Journal of the American Medical Association, 177 , 177–183